Annular burner.



L. 11. BRINKMAN.

ANNULAB BURNER; APPLICATION PILB D NOV. 23, 1904.

Patented Feb. 2, 1909.

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Inuen cqv' UNITED STATES PATENT OFFICE.

LOUIS H. BRINKMAN, OF WEST HARTFORD, CONNECTICUT, ASSIGNOR TO WHITLOOK.

COIL PIPE COMPANY,

' CON E TIC T.

' Specification of Letters Patent.

Application filed November 23, 1904. Serial No. 234,018.

OF WEST HARTFORD, CONNECTICUT, A CORPORATIQN or ANNULAR BURNER.

Patented Feb. 2, 1909.

Tooll whom it may concern:

Be it known that I, LOUIS H. BRINKMAN, a citizen of the United States, residin at West Hartford, in the county of Hart ord and State of Connecticut, have invented a new and useful Improvement in an Annular Burner, of which the following is a specificatlon, accompanied by drawings forming a part of the same, in which Figure 1 is a front elevation of my improved annular burner. Fig.2 is a side or edge View. Fig. 3 is a sectional viewon line 33, Fig. 1,, and Fig. 4 is a detached view, shown section, of the device for controlhug the admission of gas and air.

Similar reference letters and figures refer to similar parts in the different views.

My invention relates to an annular burner designed for heating the entire periphery of a pipe in a limited section ,of its length such asis used in pipe bending apparatus to surround and heat an annular portion of the plpe, thereby allowing it to be bent. It also includes means for coolin the heated port1on in order to maintain t 1e curvature after the burner is applied to an adjacent portion of the pipe.

My invention consists in the construction and arrangement of parts as hereinafter described and pointed out in the annexed claims.

Referrin tothe accompan 'ng drawings 1 denotes a y, ably cast in halves, with each half again divlded diametrically as shown in Fig. 2. The four pieces are fastened together to form the ollow annular c amber, preferhollow chamber 1 b any suitable means, as.

by. flanges 2 and b0 ts 3.

Ap roximately tan ant to the annular cham er- 1 are hollow s ells 4 which arelcast 'lntegrally with the annular chamber 1 and extend m-opposite directions. These hollow shells 4 communicate with the interior of the chamber 1 and are open at their outer ends 5.

Gas and air are admitted under pressure to the annular chamber 1 by the shells 4, through burners a shown-in'section in Fig. 4. The burners a are inserted in the outer end of each of the shells 4 where they are removably held by set screws 6. These burners are connected with air and gas suppl i es 7,

oi'w tth -10 8' and 9 by pipes 10, 11 and 12, and 12 are for the admission of air and 11' for gas. V

-mediately in front of the opening 18.

The interior construction of the burners a is shown in Fig. 4 and is as follows:'lhe pipe 10 conducts air under pressure into a central air passage 13, the pipe 11 conducts gas under pressure into an annular passage 14 concentric with the central air assa e 13 and the pipe 12 conducts air under pressure into an annular passage 15 concentric with.

the gas passage 14. The passages 14 and .15 areseparated by a flange 16, and the air passages 13 and 15 and the gas passage 14 communicate with the shell 4, and through the shell-4 into the annular chamber 1. The air and 'gas therefore intermingle inthe shell 4 which forms a mixing chamber forthe gaseous fuel which when ignited fills the entire chamber with flame, whiehis carried in a forcible current around the; annular chamber escaping through the opening18 around the pipe to be bent, as shown by. the arrows b, b, Fig. 3.

When the heated section of pipe 17 inclosed inthe burner has becoine sufficiently softened .to receive the required bend, the position of the burner is changed and the portion of the pipe which has already become partially heated by the escape of flame throu h the opening 18 is inelosed by the, annular urner. 4 The burner is provided with a water chamber 19 having holes 20 for the escape of water against the heated section of the pi e, which is thereby cooled in order that tie bend given to the heated section may be maintained. As 'the side of the burner containing the water chamber is cast in halves, I form the water chamber 19 in two parts as shown by broken' lines 19 and 19 in Fig. 1. Water is admitted under pressure to the chambers 19 through pipes 21 in the di-.

' which is arranged to deliver water from said chamber 19 upon a portion of the pipe 17 1e position of the pipe 23 is so arranged with reference to the burner and the means of exerting a bending strain that the water is delivered u'pon the pipe 17 on the inside of its curvature. In this way the temperature of alimited ort-ion of the pipe on the-inside of the bend is reduced so that its resistance to a bending strain is slightly increased and buckling or wrinkling of the pipe due to upsetting is revented, The flow of Water through t e pipe 23 is regulated by a stop cook 24.

The operation of my improved burner is as follows :After the pipe 17 has been placed in position surrounded by the annular chamber 1, gas and air under pressure are admitted to the chamber and there ignited as has been already described. When that portion of the pipe 17 surrounded by the burner reaches the necessary heat it is subjected to a bending strain by any suitable means, not shown, and the pbsition of the ipe is changed-tobring the heated portion eneath the cooling streams which flow from the holes 20. This may obviously be accomplished either by a movement of the pipe 17 in the direction of the arrow e, or by the movement of the burnerv in the opposite direction, and

thusheating and bending of successive sections of the pipe may be continued as long as v desired.

What I. claim asfmy invention and desire to secure by Letters Patent is 1-. In an annular burner designed to heat e, the combination with an annular shell inc sin a combustion chamber arranged to surround said pipe, and means for applyin heat to a portion of the pipe outside of an adjacent to said shell.

2; In an annular burner designed to heat successive-portions of a pi e, the combination I With an annular shell inc osin a combustion chamber arranged to surroun said pipe, and

having an annular opening around said pipe for the escape of flame from said shell in contact With said pi e outside of said shell.

3. In an annuar burner, the combination of an annular combustion chamber having an opening to receive a fpipe, means for heating an annular portion 0 said chamber andmeans or coohng an ansaid ipe on one side of nular portion of said pipe on the other side of said chamber. a

4. In an annular burner, the combination cums of an annular combustion chamber having a central opening adapted to receive a ipe means for heating an annular portion 0 sai pipe adjacent to said annular combustion chamber and means for cooling a limited part of said annular heated portion.

5. In an annular burner, the combination of an annular shell having a central opening adaptedto receive a pipe, with an annular opening around the pipe for the escape of flame from said shell, means for admitting a mixture of air and gas in a current tangential to said shell, and a water chamber in said shell having openings for the delivery of water to the pipe.

6. In an annular burner, the combination of an annular shell having a central opening to receive a pipe and an opening for the escape of the products of combustion next the pipe, of means for applying Water to a limited portion of the pipe next said opening.

7. In an annular burner, the combination of an annular chamber adapted to surround a pipe, said chamber being open on the inside toward the pipe and having an o ening for the products of combustion next t e pipe, of

means for admitting currents of gas and air under ressure to said chamber, and means for app ying Water to a limited portion of the pipe next to said opening.

8. In an annular burner, the combination of an annular chamber ada ted to surround a pipe, means for filling said annular chamber wlth air and gas under pressure, an annular water chamber on one side of said burner, means for admitting water to said chamber, means for ap. lying water from said water chamber to a eated annular portion of the pipe, and means for applying water from said chamber to a limited portion of the pipe on the opposite side of said burner.

Dated this 21st da of November 1904.

- LOU S H. BRINKMAN. Witnesses:

EDWARD D. REDFIELD, FRANK B. SMITH. 

